I think holding bitcoins could be a potential way to get rich only if the bitcoins price reaches very high level, otherwise you may earn some good profit, but I don't think this will make you rich.
There is definitely a good possibility of getting rich, but for that you need to have hundreds of coins that you will have to hold for many years. If that isn't the case, then you can make a good profit for sure, but you'll not even come close to getting rich. This is something that people shouldn't be focusing at these days. It's too late for for the majority of the people.